//go:build darwin || netbsd || freebsd || openbsd || dragonfly
// +build darwin netbsd freebsd openbsd dragonfly

/*
 * Copyright 2022 CloudWeGo Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cpu

import (
	"context"
	"math/rand"
	"time"
)

func getPidCPUUsage(ctx context.Context, pid int) chan float64 {
	result := make(chan float64, 1)
	go func() {
		ticker := time.NewTicker(defaultInterval)
		defer func() {
			ticker.Stop()
			close(result)
		}()
		for {
			select {
			case <-ticker.C:
			case <-ctx.Done():
				return
			}
			result <- rand.Float64() * 100
		}
	}()

	return result
}
